chore: update fight logic and effect implementations

logic/controller/fight_base.go

@@ -35,6 +35,40 @@ func (h Controller) UseSkill(data *fight.UseSkillInInfo, c *player.Player) (resu
 	return nil, 0
 }
 
+// UseSkillAt 组队/多战位技能包（cmd=7505）。
+// 目标关系：0=对方 1=自己 2=队友。
+func (h Controller) UseSkillAt(data *fight.UseSkillAtInboundInfo, c *player.Player) (result *fight.NullOutboundInfo, err errorcode.ErrorCode) {
+	if err := h.checkFightStatus(c); err != 0 {
+		return nil, err
+	}
+	actorIndex := int(data.ActorIndex)
+	targetIndex := int(data.TargetIndex)
+	targetRelation := data.TargetRelation
+
+	// 前端未显式给 relation 时，按 AtkType 兜底：3=自己，1=己方，其他按对方。
+	if targetRelation > fight.SkillTargetAlly {
+		switch data.AtkType {
+		case 3:
+			targetRelation = fight.SkillTargetSelf
+		case 1:
+			targetRelation = fight.SkillTargetAlly
+		default:
+			targetRelation = fight.SkillTargetOpponent
+		}
+	}
+
+	switch targetRelation {
+	case fight.SkillTargetSelf:
+		targetIndex = actorIndex
+		go c.FightC.UseSkillAt(c, data.SkillId, actorIndex, fight.EncodeTargetIndex(targetIndex, false))
+	case fight.SkillTargetAlly:
+		go c.FightC.UseSkillAt(c, data.SkillId, actorIndex, fight.EncodeTargetIndex(targetIndex, false))
+	default:
+		go c.FightC.UseSkillAt(c, data.SkillId, actorIndex, fight.EncodeTargetIndex(targetIndex, true))
+	}
+	return nil, 0
+}
+
 // Escape 战斗逃跑
 func (h Controller) Escape(data *fight.EscapeFightInboundInfo, c *player.Player) (result *fight.NullOutboundInfo, err errorcode.ErrorCode) {
 	if err := h.checkFightStatus(c); err != 0 {